Abstract
According to the Peierls theory, the de Haas-van Alphen oscillations should have a saw-tooth form in an ideal two-dimensional electron gas when the chemical potential is pinned to a Landau level during the entire de Haas-van Alphen period (constant number of carriers) or when a reservoir of carriers exists (fixed chemical potential). Recent experiments indicate that neither of these conditions are fulfilled, during a single period in AsF 5 intercalated graphite. We have studied both: analytically and numerically the smoothing out of the saw tooth form of the magnetization, at finite temperature, due to an external reservoir of carriers.
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